AMPLIFICATION OF SMALL SIGNALS VIA STOCHASTIC RESONANCE

被引:637
作者
JUNG, P
HANGGI, P
机构
[1] Institute of Physics, University of Augsburg
来源
PHYSICAL REVIEW A | 1991年 / 44卷 / 12期
关键词
D O I
10.1103/PhysRevA.44.8032
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Stochastic resonance is a cooperative effect of noise and periodic driving in bistable systems. It can be used for the detection and amplification of weak signals embedded within a large noise background. In doing so, the noise triggers the transfer of power to the signal. In this paper we first present general properties of periodically driven Brownian motion, such as the long-time behavior of correlation functions and the existence of a "supersymmetric" partner system. Within the framework of nonstationary stochastic processes, we present a careful numerical study of the stochastic resonance effect, without restrictions on the modulation amplitude and frequency. In particular, in the regime of intermediate driving frequencies which has not yet been covered by theories, we have discovered a secondary resonance at smaller values of the noise strength.
引用
收藏
页码:8032 / 8042
页数:11
相关论文
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